CVE-2026-26076: ntpd-rs is a full-featured implementation of the Network Time Protocol

Q: How do I fix CVE-2026-26076?

ntpd-rs: upgrade to 1.7.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-26076 being exploited?

CVE-2026-26076 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-26076 affect?

CVE-2026-26076 affects ntpd-rs. Severity is high (CVSS 7.5). ntpd-rs is a full-featured implementation of the Network Time Protocol. Prior to 1.7.1, an attacker can remotely induce moderate increases (2-4 times above normal) in cpu usage. When having NTS enabled on an ntpd-rs server, an attacker can

Q: How urgent is CVE-2026-26076?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-26076 is a high-severity flaw (CVSS 7.5) affecting ntpd-rs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ntpd-rs is a full-featured implementation of the Network Time Protocol. Prior to 1.7.1, an attacker can remotely induce moderate increases (2-4 times above normal) in cpu usage. When having NTS enabled on an ntpd-rs server, an attacker can create malformed NTS packets that take significantly more effort for the server to respond to by requesting a large number of cookies. This can lead to degraded server performance even when a server could other

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-02-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: tweedegolf

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-12 22:16 UTCPublished CVE record published
2026-06-17 10:25 UTCUpdated Record last modified

tweedegolf ntpd-rs UPGRADE

Affected: < 1.7.1

Fixed in: 1.7.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ntpd-rs || rpm -q ntpd-rs || ntpd-rs --version

2. UPGRADE to 1.7.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ntpd-rs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ntpd-rs

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-26076?

ntpd-rs: upgrade to 1.7.1. Exact commands for each OS are on this page.

Is CVE-2026-26076 being exploited?

CVE-2026-26076 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-26076 affect?

CVE-2026-26076 affects ntpd-rs. Severity is high (CVSS 7.5). ntpd-rs is a full-featured implementation of the Network Time Protocol. Prior to 1.7.1, an attacker can remotely induce moderate increases (2-4 times above normal) in cpu usage. When having NTS enabled on an ntpd-rs server, an attacker can

How urgent is CVE-2026-26076?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

References

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